docs: update emoji

Author: monkeyWie

README.md

@@ -22,7 +22,7 @@ Focus on AI image generation, turning creativity into visual art instantly
 - 🤖 **Multi-model Support** - Support multiple AI models and service providers
 - 🔄 **Cloud Sync** - Seamlessly sync your content across all devices
 
-## 🚀 Powered by Leading AI Models
+## ⚡ Powered by Leading AI Models
 
 Integrated with cutting-edge AI models and services to provide the best image generation experience:
 

README_zh-CN.md

@@ -22,7 +22,7 @@ Typix 是一款现代化、开源、易用的 AI 工具，专注于媒体内容
 - 🤖 **多模型支持** - 支持多种 AI 模型和服务提供商
 - 🔄 **云同步** - 在所有设备间无缝同步您的内容
 
-## 🚀 领先 AI 模型驱动
+## ⚡ 领先 AI 模型驱动
 
 集成最先进的 AI 模型和服务，为您提供最佳的图像生成体验：